When conducting preventative maintenance on your electric motor, there are a number of factors to consider.
Electric motors require regular maintenance in order to run properly. Motors that are critical to a business’s operations should have a maintenance technician on hand to take care of any mechanical problems. However, in lieu of a professional to conduct maintenance, electric motor owners must maintain their motors by themselves.
There are a lot of factors to keep track of when properly maintaining a motor. Everything from proper lubrication to testing the bearings is a part of motor maintenance. An owner of an electric motor should monitor the total temperature to ensure safe operation. Additionally, an owner should check the phase voltage, frequency, and power consumption of a motor while in operation, and compare the data with previous no-load and full-load power demands to get an indication of the performance of the machine. Additionally, dust and dirt should be cleaned away to prevent clogging of ventilation and breakdown of the insulation.
Below is a list of electrical maintenance steps to keep the apparatus clean and dry.
- Windings should be dry and free of dust, grease, oil, and dirt. Windings may be cleaned by suction cleaners or by wiping. Nozzles on suction type cleaners should be non-metallic. Gummy deposits of dust and grease may be removed by using a commercially available low volatile solvent.
- Terminal connections, assembly screws, bolts, and nuts should be tight. They tend to vibrate and loosen if the motor is not securely bolted.
- Insulation resistance of motors in service should be checked periodically at approximately the same temperature and humidity conditions to determine possible deterioration of the insulation. When such measurements at regular intervals indicate a wide variation, the cause should be determined. The motor should be reconditioned if the motor has been subjected to excessive moisture by re-winding or re-insulating if necessary. Enclosed motors require very little attention. Be sure that the external air chamber of fan-cooled motors does not become clogged with foreign material that will restrict the passage of air.